beagle.ediacara.org mail server error

I believe this is the mail server for some moderated groups, and just received an error:
<to2@beagle.ediacara.org> (expanded from <talk-origins@ediacara.org>): can't
    create user output file. Command output: procmail: Error while writing to
    "/var/mail/to2"
This will, of course, not allow posting to this group (talk-origins).
In case an admin reads here, just wanted to let them know.
Please let me know if I'm misinterpreting the message.
--
Retro Guy